The 25 contractors pulling the most building permits in Great Falls, ranked by PermitStack's activity score — built from 55,903 permits on file. Updated from live public records.
| # | Contractor | Permits | Score | Top trades | Last permit |
|---|---|---|---|---|---|
| 1 | FALLS MECHANICAL SERVICE | 1,570 | 84 | demolition, hvac, interior_remodel | Aug 2026 |
| 2 | GILL'S HEATING & COOLING INC. | 1,084 | 78 | hvac, mechanical, plumbing | Jun 2026 |
| 3 | ELECTRIC CITY PLUMBING LLC | 981 | 84 | hvac, interior_remodel, mechanical | Aug 2026 |
| 4 | TERRY LIGGETT CONSTRUCTION | 980 | 79 | demolition, interior_remodel, plumbing | Aug 2026 |
| 5 | KINDRED PLUMBING & HEATING INC | 931 | 60 | electrical, hvac, mechanical | Aug 2026 |
| 6 | LIBERTY ELECTRIC INC | 926 | 100 | addition, electrical, fire_alarm | Aug 2026 |
| 7 | CMG ELECTRIC LLC | 898 | 95 | addition, electrical, hvac | Aug 2026 |
| 8 | BRENNAN HEATING CO INC | 608 | 88 | electrical, hvac, interior_remodel | Jul 2026 |
| 9 | GRIZZLY PLUMBING | 572 | 88 | addition, electrical, hvac | Aug 2026 |
| 10 | CAT GRAPHICS INC | 559 | 75 | addition, electrical, foundation | Aug 2026 |
| 11 | NORTHERN HEATING & COOLING | 463 | 73 | hvac, mechanical | Jul 2026 |
| 12 | FALLS PLUMBING | 442 | 80 | hvac, interior_remodel, mechanical | Jun 2026 |
| 13 | SERVICE PLUMBERS | 430 | 53 | hvac, plumbing | Jun 2022 |
| 14 | CASCADE ELECTRIC INC | 423 | 100 | addition, demolition, electrical | Aug 2026 |
| 15 | BLUE RIBBON ELECTRIC INC | 418 | 85 | electrical, ev_charger, hvac | Jul 2026 |
| 16 | UNITED ELECTRIC | 401 | 100 | addition, battery, electrical | Aug 2026 |
| 17 | HARANT HEATING COOLING & REMODELING | 395 | 78 | addition, hvac, interior_remodel | Jul 2026 |
| 18 | PALAGI PLUMBING | 390 | 76 | mechanical, plumbing | Jun 2026 |
| 19 | MACDONALD HEATING & COOLING | 389 | 75 | hvac, mechanical | Aug 2026 |
| 20 | UNITED MATERIALS INC | 356 | 81 | demolition, interior_remodel, new_construction | Jun 2026 |
| 21 | Central Plumbing & Heating | 342 | 86 | demolition, hvac, mechanical | Jul 2026 |
| 22 | JOHNS CONSTRUCTION | 317 | 79 | demolition, electrical, fence | Jul 2026 |
| 23 | MISSION ELECTRIC | 310 | 95 | addition, electrical, hvac | Jul 2026 |
| 24 | Action Plumbing & Construction | 303 | 69 | hvac, interior_remodel, mechanical | May 2026 |
| 25 | BEST VALUE PLUMBING & ROOTER | 290 | 70 | plumbing | Aug 2026 |
"Score" is a 0–100 activity index from permit volume, recency, project value, and geographic reach. "Permits" counts building permits this contractor pulled in Great Falls.
Query contractors, scores, and permits programmatically — GET /v1/contractors/search?state=MT&sort=score